Spin-wave channeling in magnetization-graded nanostrips
Author
dc.contributor.author
Gallardo, Rodolfo A.
Author
dc.contributor.author
Alvarado Seguel, Pablo Alberto
Author
dc.contributor.author
Brevis, Felipe
Author
dc.contributor.author
Roldán Molina, Alejandro René
Author
dc.contributor.author
Lenz, Kilian
Author
dc.contributor.author
Lindner, Jürgen
Author
dc.contributor.author
Landeros, Pedro
Admission date
dc.date.accessioned
2023-11-22T12:55:01Z
Available date
dc.date.available
2023-11-22T12:55:01Z
Publication date
dc.date.issued
2022
Cita de ítem
dc.identifier.citation
Nanomaterials 2022, 12, 2785.
es_ES
Identifier
dc.identifier.other
10.3390/nano12162785
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/196479
Abstract
dc.description.abstract
Magnetization-graded ferromagnetic nanostrips are proposed as potential prospects to
channel spin waves. Here, a controlled reduction of the saturation magnetization enables the
localization of the propagating magnetic excitations in the same way that light is controlled in an
optical fiber with a varying refraction index. The theoretical approach is based on the dynamic matrix
method, where the magnetic nanostrip is divided into small sub-strips. The dipolar and exchange
interactions between sub-strips have been considered to reproduce the spin-wave dynamics of the
magnonic fiber. The transition from one strip to an infinite thin film is presented for the Damon-
Eshbach geometry, where the nature of the spin-wave modes is discussed. An in-depth analysis
of the spin-wave transport as a function of the saturation magnetization profile is provided. It is
predicted that it is feasible to induce a remarkable channeling of the spin waves along the zones with
a reduced saturation magnetization, even when such a reduction is tiny. The results are compared
with micromagnetic simulations, where a good agreement is observed between both methods. The
findings have relevance for envisioned future spin-wave-based magnonic devices operating at the
nanometer scale.
es_ES
Lenguage
dc.language.iso
en
es_ES
Publisher
dc.publisher
MDPI
es_ES
Type of license
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 United States